Soil cores agricultural pesticides

Pesticides from the CCCs were shown not to have leached Into any of the available ground water sources. In addition, the soil core analyses Indicated that disposed chemicals had traveled less than 18 Inches from the leach lines In five years of operation. Within the defined time frame, the CCCs were confining the chemicals. A long-term follow-up survey. Including test wells, would be useful to determine if migrating pesticides eventually reach the water table. The absence of any Increased risk to applicators, or of any environmental drawbacks, as measured by soil arthropod populations, was established. Consequently, the New York State Department of Environmental Conservations has regarded these Installations as normal agricultural operations and not required further documentation. 

While agricultural soils now have nonracemic OC pesticide residues and emit these nonracemic compositions to the atmosphere, this was not necessarily always the case. Archived extracts of air samples collected in Sweden, Slovakia, and Iceland between in the early 1970s had racemic cis- and fra 5-chlordane [138]. This observation suggests that those residues were released either from fresh emissions, as these compounds were in active use at the time, and/or they were volatilized from racemic residues in soil. The former hypothesis is more likely, given the EFs of these compounds in sediment cores, which were racemic in the 1950s but less so after that point, including the 1970s [138, 139]. 

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